P1656

Set by the manufacturer, so it means different things on different makes. 17 makes in the table below.

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What P1656 means, by make 17 makes

Acura Automatic Transaxle
Audi Air conditioning input / output short circuit to ground 4690 18064
Chevrolet Driver 2 Line 6
Chrysler J1850 Communication Bus Busy/Not Available
Dodge J1850 Communication Bus Busy/Not Available
Ford CAN LINK PCM/PCM CIRCUIT/NETWORK
Honda Problem in PCM - toVTM - 4 Control Unit Communications Circuit
Jaguar Amplifier failure for valve sensor circuit malfunction
Jeep J1850 Communication Bus Busy/Not Available
Lexus OCV Circuit Malfunction (Bank 1)
Lincoln CAN Link PCM - PCM Circuit - Network
Mercury CAN Link PCM - PCM Circuit - Network
Porsche Coolant Shutoff Valve
Saab A/C Relay Coil Circuit. Open/Short to Ground.
Toyota OCV Circuit Malfunction Bank 1
Volkswagen Air conditioning input / output short circuit to ground 4690 18064
Volvo A/C clutch relay circuit short to ground

Each line is that manufacturer's own meaning for P1656. They are genuinely different faults, not rewordings of one, so a meaning listed against one make says nothing about the others. If your make is not listed, we do not hold it - your manufacturer's service information is the authority.

Code structure P1656

Powertrain

engine, transmission and emissions

Manufacturer-specific

Defined by the vehicle manufacturer, so the meaning varies between makes.

Fault index

identifies the specific fault

Powertrain Manufacturer-specific

Nearby codes in the P1 range

Manufacturer code meanings from kierandrewett/obd (b56a07a), used under the MIT licence. Copyright (c) Kieran Drewett. SpareRadar is not affiliated with the dataset's authors.